import React, { useState, useEffect, useMemo } from 'react';
import { 
  Megaphone, 
  PartyPopper, 
  MessageCircle, 
  FileText, 
  AlertCircle, 
  Plus, 
  Printer,
  LayoutDashboard,
  Share2,
  ClipboardList,
  Image as ImageIcon,
} from 'lucide-react';

// Modular Imports
import { PRSummary } from './pr/PRSummary';
import { EventsRegistry } from './pr/EventsRegistry';
import { ResidentReports } from './pr/ResidentReports';
import { NegativeResolution } from './pr/NegativeResolution';
import { PRFeedbackFeed } from './pr/PRFeedbackFeed';
import { SMMManager } from './pr/SMMManager';
import { NPSSurveysManager } from './pr/NPSSurveysManager';
import { WorkPhotosDirectory } from './pr/WorkPhotosDirectory';
import { allowedSubsForSection } from '../constants/permissions';

type Tab = 'summary' | 'smm' | 'events' | 'feedback' | 'reports' | 'photos' | 'nps' | 'negative';

const PR_TABS: Tab[] = ['summary', 'smm', 'events', 'feedback', 'reports', 'photos', 'nps', 'negative'];
const SUBTAB_KEY = 'mkd_subTab_pr';

interface PRModuleProps {
  allowedPermissions?: string[] | null;
}

export const PRModule: React.FC<PRModuleProps> = ({ allowedPermissions }) => {
  const visibleTabs = useMemo(() => {
    const allowed = allowedSubsForSection(allowedPermissions ?? [], 'pr');
    if (allowed === 'all') return PR_TABS;
    return PR_TABS.filter((t) => allowed.includes(t));
  }, [allowedPermissions]);

  const [activeTab, setActiveTab] = useState<Tab>(() => {
    const s = localStorage.getItem(SUBTAB_KEY);
    return (s && PR_TABS.includes(s as Tab)) ? s as Tab : 'summary';
  });

  useEffect(() => {
    if (visibleTabs.length > 0 && !visibleTabs.includes(activeTab)) {
      setActiveTab(visibleTabs[0]);
    }
  }, [visibleTabs, activeTab]);

  useEffect(() => {
    if (visibleTabs.includes(activeTab)) localStorage.setItem(SUBTAB_KEY, activeTab);
  }, [activeTab, visibleTabs]);

  return (
    <div className="animate-fade-in pb-20">
      <div className="flex justify-between items-center mb-6 px-1">
         <div>
            <h2 className="text-xl font-bold text-slate-800 leading-none">PR и Лояльность (NPS)</h2>
            <p className="text-[10px] text-slate-400 font-black uppercase tracking-widest mt-1">Клиентский опыт и управление репутацией</p>
         </div>
         <div className="flex gap-2">
            <button 
                className="p-2.5 bg-white border border-slate-200 text-slate-400 rounded-xl hover:text-primary-600 transition-all shadow-sm" 
                title="Печать аналитики"
            >
                <Printer className="w-5 h-5"/>
            </button>
            <button 
                className="bg-primary-600 text-white p-2.5 rounded-xl shadow-lg shadow-primary-500/30 flex items-center gap-2 px-4 text-xs font-black uppercase tracking-wider active:scale-95 transition-all"
                onClick={() => alert("Форма сбора NPS / Создание мероприятия")}
            >
                <Plus className="w-4 h-4" /> Создать
            </button>
         </div>
      </div>

      {/* Sheet Selector */}
      <div className="flex p-1 bg-slate-200/50 rounded-2xl mb-6 overflow-x-auto no-scrollbar gap-1">
        {[
            { id: 'summary', label: 'Сводка', icon: LayoutDashboard },
            { id: 'smm', label: 'SMM', icon: Share2 },
            { id: 'events', label: 'Мероприятия', icon: PartyPopper },
            { id: 'feedback', label: 'Отзывы', icon: MessageCircle },
            { id: 'reports', label: 'Отчеты жителям', icon: FileText },
            { id: 'photos', label: 'Фото отчёты', icon: ImageIcon },
            { id: 'nps', label: 'NPS опросы', icon: ClipboardList },
            { id: 'negative', label: 'Негатив', icon: AlertCircle },
        ].filter((tab) => visibleTabs.includes(tab.id as Tab)).map((tab) => (
            <button 
              key={tab.id}
              onClick={() => setActiveTab(tab.id as Tab)}
              className={`flex-shrink-0 min-w-[7rem] flex items-center justify-center gap-2 py-2.5 px-4 text-[10px] font-black uppercase tracking-wider whitespace-nowrap rounded-xl transition-all ${activeTab === tab.id ? 'bg-white text-primary-600 shadow-sm border border-white' : 'text-slate-500 hover:text-slate-700'}`}
            >
              <tab.icon className="w-3.5 h-3.5"/> {tab.label}
            </button>
        ))}
      </div>

      {/* Dynamic Sheet Content */}
      <div className="min-h-[280px] sm:min-h-[360px] md:min-h-[500px]">
        {activeTab === 'summary' && <PRSummary onNavigate={setActiveTab} />}
        {activeTab === 'smm' && <SMMManager />}
        {activeTab === 'events' && <EventsRegistry onNavigate={setActiveTab} />}
        {activeTab === 'feedback' && <PRFeedbackFeed />}
        {activeTab === 'reports' && <ResidentReports />}
        {activeTab === 'photos' && <WorkPhotosDirectory />}
        {activeTab === 'nps' && <NPSSurveysManager />}
        {activeTab === 'negative' && <NegativeResolution />}
      </div>
    </div>
  );
};